Mold for undercut tiles.



PATENTED APR. 17, 1906.

W. Hm CAMMEYER.

, MOLD FOR UNDERGUT TILES.

APPLICATION FILED MAY 3, 1904.

nmmum/ UNITED STATES PATENT OFFICE.

WILLIAM H. CAMMEYER, or BOONTON, NEW JERSEY. MoLD FOR UNDERCUT TILES.

Original application filed March 4,1904, Serial No.196,552. Divided and this application filed May 3, 1904.

Specification of Letters Patent.

Patented April 17, 1906.

$erial l lo-206,225.

To all whom it may concern:

Beit known that I,W1LLIAM H.0AMMEYER, of Boonton, Morris county, New Jersey, (postoffice address, 846 Prospect Place, Brooklyn, New York,) have invented a new and useful Improvement in Molds for Undercut Tiles, which is fully set forth in the following specification.

This application relates to the production of tiles, and is a division of my pending application, Serial No. 196,552, filed March 4,1904. The object of the invention is to produce an undercut mortise or seat upon the back or bottom of the tile, as set out in that application.

The present invention consists of a mold employing a blank as a former in producing the undercut in the tile and provided with a continuous knife-edge around the upper margin.

The invention will best be understood by reference to the accompanying drawings, in which Figure 1 shows one form of my mold. Fig. 2 is a perspective of the blank used therewith. Fig. 3 is a perspective of a tile formed therein. Fig. 4 illustrates another form of mold, and Fig. 5 shows the tile made therein.

Referring to Fig. 1, A represents the mold for receiving the composition that is to constitute the tile. B is a rib risin from the floor of the mold and having its si es vertical or even comin nearer to ether at the top. Viewed from a ove, the sides of rib B may be either parallel or flaring, and there may be a plurality of transverse ribs B. C represents a (metal) blank that in the form shown consists of a rectangular sheet having its two sides bent inward and downward, as shown in Fig. 2, and placed astride the rib B. It will be noted that when this blank is bent into shape to act as a former it presents the two v protruding shoulders c c, that extend beyond the sides of the rib. Preferably the margin of mold A is a raised knife-edge d, continuing all around the margin, and I may provide the raised surface a for the roller D to travel on, so that the knife-edge will not cut the rolle or become dulled thereby.

In use the mold is filled with suitable composition (which term includes glass, porcelain, and, in fact, any material or substance suitable for making tiles) and pressure applied, as by roller D,whereupon the tile is finished and is readily removed, as by inverting mold A. The shoulders c 0 form the undercuts, as the composition takes its place and becomes set all around the sides of the former C without crushing these shoulders or entering into the space outlined by them. When the roller D runs over the top of the mold,the knife-edges a cut off any fin that might otherwise be produced around the upper edge of the tile. At no time during this formation has the tile been interlocked with its mold, and when the tile is removed the former 0 comes away with it and remains as a lining for the mortise or seat.

In Fig. 4 stout studs B take the place of the longitudinal rib B in Fig. 1, and instead of the rectangular blank 0, I employ blanks made into round caps or cups 0, that overhang their studs. The tile is produced in the mold, as before, and is shown in Fig. 5, which illustrates undercut holes instead of undercut longitudinal grooves.

Of course I do not limit myself to any particular composition for making these tiles or to any particular shape of tile or to any particular shape of mortise or seat or to any particular material or shape for the blank. The sides of the blank or former need not extend all the way downto the floor of the mold, as shown in Fig. 1, although this is preferable.

Having thus described my invention, I claim 1. A mold for making undercut tiles, containing a rib fast upon its floor, and a former astride upon said rib and provided with overhanging shoulders whose inner faces (adjacent to said rib) outline the undercut in the tile.

2. A mold for forming undercut tiles, having upon its floor a rib, with vertical sides, in combination with a former seated upon said rib, and composed of a blank whose sides are bent downward and inward to less than a right angle with its main portion.

3. A mold for making undercut tiles, con-' taining a projection upon its floor, and a detachable former thereon provided with over hanging shoulders whose inner faces (adjacent to said projection) outline the undercut in the tile.

4. A mold for making undercut tiles containing a projection fast upon its floor, and a detachable former thereon composed of a blank whose sides are bent downward and inward to less than a right angle with its main portion.

5. Theherein-described means for forming In testimony whereof I have signed this undercut tiles, comprising a mold having a specification in the presence of two subscribprojection rising from its floor and a detaching Witnesses.

able and non combustible former seated WILLIAM H. OAMMEYER. 5 upon said projection and provided With over- Witnesses:

hanging shoulders Whose inner faces serve to C. A. L. MAssIE,

outline the undercut. R. L. Scorn, 

